Hose-coupling gasket



will 1H: W280 A. Wmcmm' HOSE COUPLING GASKET Filed Jan. 4, 1927 INVENTOR ALBERTA. MAM (E RT ATTORNEY Edict,

application filed January 4, 1921?. Serial No. 158,938.

This invention relates to hose couplings and more particularly to the type of hand operated hose couplings employed to connect up the fluid pressrure b 'ake pipe between cars. The standard hose coupling head is provided with an annular recess, adjacent to the meeting .iface ot the coupling and adapted to receive a corresponding flange portion of a hose coupling gasket. lhe annular recess has flaring walls while the gasket flange is wedge shaped, so that when assembled, the wedge faces of the gasket flange are adapted to seal against the flared walls of the recess in the coupling head. 7

lit sometimes occurs that the gasket flange flts so poorly in the recess as to cause a distortion Off the gasket, which. permits leakage around the outer walls of the gasket and causes a contraction of the central opening l through the gasket with a resultant restriction to the flow of fluid under pressure. A distorted gasket prevents accurate engagement with a corresponding gasket in a counterpart coupling head and results in a tendency to leakage, as well as a variation in the degree of compression oi gaskets when coupling. Furthermore, gaskets tend to take a permanent set, due to being held under compression in the coupled position, with the result that such a gasket having a permanent set acts at a reduced pressure against a counterpart gasket, so that there is liable to be insuflicient pressure to eflect a tight seal be tween two gaskets.

provide an improved hose coupling head in which the above difliculties are overcome.

in the accompanying drawing, the single figure. is a fragmentary sectional view oi a hose coupling head and gasket, embodying my invention.

As shown in the drawing, the coupling head 1 is provided with the usual locking flanges 2 and 3 and has an annular recess 4, adjacent to the meeting face. of the head, said recess having flaring walls, such as employed in the standard hose coupling head. The flange ot a standard gasket 5 is fltted into the recess 41-.

According to my invention, means are provided for exerting a pressure on the gasket in such a way that the heretofore described difliculties are overcome. For this purpose a ring The Jrinci Jal ob'ect of in Y invention is to 7 is provided having a concave tace adapted to engage the rounded corner (3 oi the gasket. Integral with said ring are struts 9 which are also integrally joined to a flange portion 12 of a sleeve 8. The sleeve 8 is slidably mounted on a stem 10 secured to the coupling head body and a coil spring 13 is interposed between the coupling head and the flanged portion 12 of the stem 10. @utward movement of the sleeve by the spring 13 is limited by a stop pin 11 carried by the stem 10 and movement of the sleeve in the opposite direction is limited by engagement with the inner wall of the coupling head.

The pressure of the spring 13 is trans mitted through the flange 12 of the sleeve 8 and the struts 9 to the ring 7, which therefore exert a pressure against the corner 6 of the gasket 5, tending to push the flange 1--l of said gasket into the annular recess 4, thereby wedging the sides of said gasket flange against the walls of the recess, so as to effect a tight seal to prevent leakage around the outer walls of said gasket. The pressure exerted by the ring 7 also tends to hold the cylindrical portion 15 of the gasket 5 outwardly and at the same time said cylindrical portion is forced against the annular wall 16 of the hose coupling head. Thus, besides eflecting a tight seal at the flange portion of the gasket, the gasket is maintained in engagement with the annular wall is so as to provide the ll'liLXlnium area of opening through said gasket.

/Vhen two counterpart couplings are coupled together, a uniform compression of the two engaging gaskets is ensured by the con stant opposing pressure oil the spring 13. Even though a gasket should have a permanent set, the constant pressure of spring 13 ensures that said gasket will exert a pressure the same as a new gasket.

Since the pressure of the ring against the gasket 5 tends to efllect a tight seal of the gasket flange 14: in the recess 4, moisture or dirt cannot enter and become deposited on the sealing surfaces engaged by the gasket, so that said surfaces will not become pitted or rusted and thus cause leakage; it being noted, that with the usual hose coupling, such pitting and rusting is otten such that the recess is unflt tor the installation of a new gasket.

Havlng now described nay invention, what I claim as new and desire to secure by Letters Patent, is V The combination. with a hose coupling head having a conduit provided with an 5 opening at the meeting face of the head and having an annular recess adjacent to said opening, and agasket having an annular flange disposed in said recess, of a stem mounted in said head in axial alinementwith 'saidopeni0 ing, a member slidably mounted on said stem and engaging said gasket, and a spring acting on said member and tending to press same in engagement with said gasket, and a stop carried by said stem and adapted to be engaged by said member for limiting the movement of said member by said spring.

In testimony whereof I have hereunto set my hand.

ALBERT A. MACKERT. 

